Spray gun



FIG. 1 is a left side elevational view of a spray gun, showing our new design, the right side elevational view being a mirror image thereof;

FIG. 2 is a top plan view thereof;

FIG. 3 is an end elevational view thereof;

FIG. 4 is an end elevational view of the end opposite to that shown in FIG. 3; and,

FIG. 5 is a bottom plan view thereof. 

The ornamental design for a spray gun, as shown and described. 